############### Application: IrfanView FlashPix PlugIn Double-Free Vulnerability Platforms: Windows Exploitation: Remote code execution Secunia Number: SA47322 {PRL}: 2011-11 Author: Francis Provencher (Protek Research Lab's) Website: http://www.protekresearchlab.com/ Twitter: @ProtekResearch ##################################################################################### 1) Introduction 2) Timeline 3) Technical details 4) PoC ##################################################################################### =============== 1) Introduction =============== IrfanView is a freeware/shareware image viewer for Microsoft Windows that can view, edit, and convert image files and play video/audio files. It is noted for its small size, speed, ease of use, and ability to handle a wide variety of graphic file formats, and has some image creation and painting capabilities. The software was first released in 1996. IrfanView is free for non-commercial use; commercial use requires paid registration. ##################################################################################### ============ 2) Timeline ============ 2011-12-08 - Vulnerability reported to vendor 2011-12-20 - Coordinated public release of advisory ##################################################################################### ================= 3) Technical details ================= The vulnerability is caused due to the "Free_All_Memory()" function not properly setting certain decoder elements to NULL after freeing them, which can be exploited to cause a double-free condition via specially crafted FPX images. ##################################################################################### ============= 4) The Code ============= http://www.exploit-db.com/sploits/18256.fpx http://www.protekresearchlab.com/exploits/PRL-2011-11.fpx